A. Their decision. B. Working hours.

　　C. The money that they make. D. The traditional age to retire.

10．What would happen in the career of most older workers?

　　 A. They would be paid less. B. They would change their jobs.

　　 C. They would earn more money. D. They would have a talk with employers.

11．What is the main idea of this passage?

　　 A. America will have more older people.

　　 B. Older Americans have to work past 65.

　　 C. American people will have new jobs after 65.

　　 D. More Americans choose to work for more years.

　　The World Happiness Report, a United Nations agency report, measures how happy people are, and why. Norway is the happiest place on earth---beating neighbor Denmark from the number one position.

　　Denmark, Iceland, Switzerland and Finland round out the top five, while the Central African Republic came last. Western Europe and North America took up most of the places at the top of table, with the US and UK at 14th and 19th.

　　The World Happiness Report mainly depends on asking a simple question of more than 1,000 people every year in more than 150 countries. "Imagine a ladder, with steps numbered from 0 at the bottom to 10 at the top," the question asks. "The top of the ladder is the best possible life for you and the bottom of the ladder is the worst possible life for you. On which step of the ladder would you say you personally feel you stand at this time?"

　　The average result is the country's score-from Norway's 7.54 to the Central African Republic's 2.69. But the report also tries to explain why one country is happier than another. It looks at reasons including economic strength, social support, freedom of choice, and generosity.

　　This year's report also has a text titled "restoring American happiness", which examines why happiness levels in the United States are falling, despite continually-increasing economic improvement. "The United States can and should raise happiness by addressing America's social problems---rising inequality and distrust---rather than focusing mainly on economic growth," the authors said.

　　Jeffrey Sachs, the director of the Sustainable Development Solutions Network, which published the report, said President Donald Trump's policies were likely to make things worse.

12．Which of the following shows the correct order of happiness level?

A. Finland, the UK, the US, Iceland B. Finland, the US, the UK, Iceland